<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="@/assets/logo.png" alt="">
      </div>
      <!-- 登录表单区域 -->
      <el-form ref="loginFromRef" label-width="8px" class="login_from" :model="Loginform" :rules="Loginfromrules">
         <!-- 用户名 -->
        <el-form-item label="" prop="username">
          <el-input v-model="Loginform.username"  prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item label="" prop="password">
          <el-input v-model="Loginform.password" type="password"  prefix-icon="iconfont icon-3702mima"></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item label="" class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginFrom">重置</el-button>
        </el-form-item>
      </el-form>
    </div>

  </div>
</template>

<script>
export default {
  data(){
  return{
    //这是登录表单的数据绑定对象
  Loginform:{
      username:'admin',
      password:'123456'
  },
  //这是表单的验证规则对象 
  Loginfromrules: {
          //验证用户是否合法
          username: [
            { required: true, message: '请输入用户名称', trigger: 'blur' },
            { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
          ],
          //验证密码是否合法
          password:[
          { required: true, message: '请输入密码', trigger: 'blur' },
            { min: 6, max: 10, message: '长度在 6 到 10 个字符', trigger: 'blur' }
        ]
        
        }
  }
  },
  methods:{
    //点击重置按钮，重置登录表单
    resetLoginFrom(){
    // console.log(this);
    this.$refs.loginFromRef.resetFields();
    },
    login(){
    this.$refs.loginFromRef.validate(async valid=>{
    // console.log(valid);
      if(!valid) return
      const {data:res} = await this.$http.post('login',this.Loginform)
      // console.log(res)
      if(res.meta.status !== 200) return this.$message.error('登陆失败！')
      this.$message.success('登陆成功！')
      //1.将登录成功之后的token，保存到客户端的sessionStorage（会话期间的储存机制）中
      //1.1项目中除了登录之外的其他API接口，必须在登陆之后才能访问
      // 1.2token只应在当前网站打开期间生效，所以将token保存在sessionStorage中
      console.log(res);
      window.sessionStorage.setItem("token",res.data.token)
      // 2.通过编程式导航跳转到后台主页，路由地址是/home
      this.$router.push("/home")
  })  
    }
  }

}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}

.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 23px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    background-color: #fff;
    box-shadow: 0 0 10px #2b4b6b;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);

    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}
.btns{
  display: flex;
  justify-content: flex-end;
}
.login_from{
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;  

}
</style>